Antioch, California:IS_PART_OF:Contra Costa County, California####Antioch, California:IS_PART_OF:California####California:LANGUAGE:English language####Contra Costa County, California:IS_PART_OF:San Francisco Bay Area####Antioch, California:LEADER_TITLE:California's 11th State Assembly district
Antioch is part of California and they speak English there. Antioch is part of Contra Costa County in California which is in the San Francisco Bay area and the leader title is California's 11th State Assembly district.